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Method for harmless degradation of PCP (pentachlorophenol) by using ECH (epoxy chloropropane)-SBR (styrene-butadiene rubber) combined process

A technology of ECH-SBR and combined process is applied in the field of harmless degradation of pentachlorophenol (PCP) to achieve the effect of high catalytic activity and low price

Active Publication Date: 2014-06-25
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Documents ①, ②, and ③ only convert chlorinated organic substances into less toxic organic substances, and none of them really involve the complete harmless treatment of chlorinated organic substances, which belong to pre-treatment technology

Method used

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  • Method for harmless degradation of PCP (pentachlorophenol) by using ECH (epoxy chloropropane)-SBR (styrene-butadiene rubber) combined process
  • Method for harmless degradation of PCP (pentachlorophenol) by using ECH (epoxy chloropropane)-SBR (styrene-butadiene rubber) combined process

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Experimental program
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Embodiment 1

[0023] 1) in Pd 2+ (15mM), Cu 2+ (5mM), in the pH1.0 electrolyte, the titanium mesh is the cathode, the platinum sheet is the anode, and the constant potential is -0.9V (relative to Hg / Hg 2 SO 4 electrode) deposited for 25min to obtain a Pd-Cu / Ti electrode. The potential scanning range is -800mV~700mV, the scanning speed is 50mV / s, and the CV scans the Pd-Cu / Ti electrode 50 times to obtain a CV50Pd-Cu / Ti electrode.

[0024] 2) Add 30mL10mg / L PCP and Na to the cathode chamber of the electrolytic cell in the bipolar chamber 2 SO 4 , where Na 2 SO 4 Concentration 0.05M, add 30mL0.05M Na to the anode chamber 2 SO 4 , 0.1M sulfuric acid to adjust the pH of the cathode chamber to 2.3. The electrode prepared in step (1) was placed in the cathode chamber of the reactor, and the platinum sheet was used as the counter electrode to be placed in the anode chamber. Dechlorination was performed at 5 mA for 90 minutes. cathodic reactant solution.

[0025] 3) From 1 to 95 days, in a...

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Abstract

The invention discloses a method for harmless degradation of PCP (pentachlorophenol) by using an ECH (epoxy chloropropane)-SBR (styrene-butadiene rubber) combined process, belonging to the technical field of electrochemical water treatment. The method comprises the steps of firstly efficiently converting PCP into phenol by using a Pd-Cu electrode with high catalytic activity, acclimating activated sludge by taking phenol as the only carbon source at the same time, and finally performing phenol degradation on a dechlorination product by using the acclimated activated sludge so as to realize the harmless removal of PCP. The ECH-SBR combined process realizes 100% efficient completely-harmless degradation of a highly-toxic pollutant, namely, PCP.

Description

technical field [0001] The invention uses an electrochemical reduction dechlorination (ECH)-sequencing batch activated sludge (SBR) combined process to degrade pentachlorophenol (PCP) harmlessly, and belongs to the technical field of electrochemical water treatment. Background technique [0002] Chlorophenols are typical organic pollutants that are difficult to degrade, highly toxic, and have good chemical and thermal stability. There are currently two main research trends for chlorophenols as a pollutant: one is to simply use one technology to remove chlorophenols, such as adsorption, advanced oxidation, biological oxidation, etc.; the other is to only convert chlorophenols into less toxic Phenol, such as reduction dechlorination technology, etc. The adsorption method only changes the existence of chlorophenols and does not really destroy the pollutants. It is cumulative and may enter the human food chain, which is a potential hazard. Advanced oxidation or biological oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461C02F101/34C02F101/36
Inventor 孙治荣沈海涛魏学锋
Owner BEIJING UNIV OF TECH
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